Razor sharpener



FIG. 1 is a front view of a razor sharpener showing my new design, a rear view being identical;

FIG. 2 is a left side view of the razor sharpener, a right side view being identical;

FIG. 3 is a top view of the razor sharpener;

FIG. 4 is a bottom view of the razor sharpener; and,

FIG. 5 is a top front side perspective view of the razor sharpener. 

CLAIM The ornamental design for a razor sharpener, as shown and described. 